Protective arrangement for a plug-connected electric motor sealed against pressure, vapors and radiation

Claim 1

An electric motor construction for nuclear plants, comprising: a housing; a motor rotor rotatably mounted in said housing; a stator with a plurality of grooves and stator windings, said stator disposed in said housing and around said rotor; said housing having a wall with an opening therein; a terminal box plug connected to said stator windings mounted on said wall around said opening including upper and lower interengageable connector parts with a plurality of cables extending through said upper and lower interengageable connector parts; a sealing gasket between said upper and lower interengageable parts; said stator windings having lead wires leading from said housing to said connector parts and connected to said cables at a connection; first continuous sealing compound resistant to humidity, vapor and gamma radiation, embedding said stator windings, said lead wires, said connection, at least a part of said cables and filling said grooves, said first continuous sealing compound extending from said housing into said connector parts; and a second continuous sealing compound resistant to humidity, vapor and gamma radiation, embedding upper portions of said cables in said upper interengageable connector part above said gasket, said first continuous sealing compound extending in said lower interengageable connector part up to said gasket and said second continuous sealing compound filling an upper portion of said upper interengageable connector part and extends down to a location above said gasket.